module

MS11-050 IE mshtml!CObjectElement Use After Free

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Disclosed
Jun 16, 2011
Created
May 30, 2018

Description

This module exploits a use-after-free vulnerability in Internet Explorer. The
vulnerability occurs when an invalid tag exists and other elements
overlap/cover where the object tag should be when rendered (due to their
styles/positioning). The mshtml!CObjectElement is then freed from memory because
it is invalid. However, the mshtml!CDisplay object for the page continues to keep
a reference to the freed and attempts to call a function on it, leading
to the use-after-free.

Please note that for IE 8 targets, JRE (Java Runtime Environment) is required
to bypass DEP (Data Execution Prevention).

Authors

d0c_s4vage
sinn3r sinn3r@metasploit.com
bannedit bannedit@metasploit.com

Platform

Windows

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':


    msf > use exploit/windows/browser/ms11_050_mshtml_cobjectelement
    msf exploit(ms11_050_mshtml_cobjectelement) > show targets
        ...targets...
    msf exploit(ms11_050_mshtml_cobjectelement) > set TARGET < target-id >
    msf exploit(ms11_050_mshtml_cobjectelement) > show options
        ...show and set options...
    msf exploit(ms11_050_mshtml_cobjectelement) > exploit
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